op 	 {
  name: "WriteGraphSummary"
  input_arg {
    name: "writer"
    type: DT_RESOURCE
  }
  input_arg {
    name: "step"
    type: DT_INT64
  }
  input_arg {
    name: "tensor"
    type: DT_STRING
  }
  is_stateful: true
}
